| 1 | /* ELLE - Copyright 1982, 1984, 1987 by Ken Harrenstien, SRI International
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| 2 | * This software is quasi-public; it may be used freely with
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| 3 | * like software, but may NOT be sold or made part of licensed
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| 4 | * products without permission of the author.
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| 5 | */
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| 6 | /*
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| 7 | * EEF3 Various Functions (Yanking, Indentation, miscellaneous)
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| 8 | */
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| 9 |
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| 10 | #include "elle.h"
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| 11 |
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| 12 | #if FX_APPNKILL
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| 13 | /* EFUN: "Append Next Kill" */
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| 14 | f_appnkill()
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| 15 | { this_cmd = KILLCMD; /* Fake out next call to ed_kill */
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| 16 | }
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| 17 | #endif /*FX_APPNKILL*/
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| 18 |
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| 19 | #if FX_UNKILL
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| 20 | /* EFUN: "Un-kill" */
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| 21 | f_unkill()
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| 22 | { register SBSTR *sd;
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| 23 |
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| 24 | if((sd = kill_ring[kill_ptr]) == 0)
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| 25 | { ring_bell();
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| 26 | return;
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| 27 | }
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| 28 | mark_dot = cur_dot; /* Set mark at old location */
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| 29 | mark_p = 1; /* Mark's been set */
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| 30 | sb_sins((SBBUF *)cur_buf,sbs_cpy(sd)); /* Insert copy of stuff */
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| 31 | cur_dot = e_dot(); /* We're now after the new stuff */
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| 32 | buf_tmat(mark_dot); /* Say modified from here to cur_dot*/
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| 33 | this_cmd = YANKCMD;
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| 34 | }
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| 35 | #endif /*FX_UNKILL*/
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| 36 |
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| 37 | #if FX_UNKPOP
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| 38 | /* EFUN: "Un-kill Pop" */
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| 39 | f_unkpop()
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| 40 | { register SBSTR *sd;
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| 41 | register int i;
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| 42 |
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| 43 | if (last_cmd != YANKCMD)
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| 44 | { ring_bell ();
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| 45 | return;
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| 46 | }
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| 47 | ed_delete(cur_dot,mark_dot);
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| 48 | if(cur_dot > mark_dot)
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| 49 | cur_dot = mark_dot;
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| 50 | i = KILL_LEN;
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| 51 | do {
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| 52 | if(--kill_ptr < 0)
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| 53 | kill_ptr = KILL_LEN-1;
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| 54 | if(sd = kill_ring[kill_ptr])
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| 55 | break;
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| 56 | } while(--i);
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| 57 |
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| 58 | /* kill_ptr now pointing to right place; effect the yank. */
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| 59 | e_gocur(); /* Make sure point at right place too! */
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| 60 | return(f_unkill());
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| 61 | }
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| 62 | #endif /*FX_UNKPOP*/
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| 63 | |
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| 64 |
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| 65 | /* Indentation routines - still not polished */
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| 66 |
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| 67 | #if FX_INDATM
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| 68 | /* EFUN: "Indent According to Mode" */
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| 69 | /* In Fundamental mode, just inserts a tab.
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| 70 | */
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| 71 | f_indatm()
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| 72 | { f_insself(TAB); /* This takes care of mode checking */
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| 73 | }
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| 74 | #endif /*FX_INDATM*/
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| 75 |
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| 76 | #if FX_INDNL
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| 77 | /* EFUN: "Indent New Line" */
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| 78 | f_indnl() /* execute CR followed by tab */
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| 79 | {
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| 80 | #if IMAGEN
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| 81 | /* Not dispatch-based, but rather hard-wired to do Gosmacs thing */
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| 82 | ed_crins();
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| 83 | f_indund();
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| 84 | #else
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| 85 | cmd_xct(CR);
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| 86 | cmd_xct(TAB);
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| 87 | #endif /*-IMAGEN*/
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| 88 | }
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| 89 | #endif /*FX_INDNL*/
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| 90 |
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| 91 |
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| 92 | #if FX_BACKIND
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| 93 | /* EFUN: "Back to Indentation"
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| 94 | ** Moves to end of current line's indentation.
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| 95 | */
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| 96 | f_backind()
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| 97 | { e_gobol(); /* First move to beg of line */
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| 98 | e_gofwsp(); /* Then forward over whitespace */
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| 99 | ed_setcur();
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| 100 | }
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| 101 | #endif /*FX_BACKIND*/
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| 102 |
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| 103 |
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| 104 | #if FX_INDCOMM
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| 105 |
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| 106 | static char *comm_beg = "/* ";
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| 107 | static char *comm_end = " */";
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| 108 |
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| 109 | /* EFUN: "Indent for Comment" */
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| 110 | f_indcomm()
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| 111 | {
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| 112 | f_endline();
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| 113 | if(indtion(cur_dot) < ev_ccolumn)
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| 114 | ed_indto(ev_ccolumn);
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| 115 | else ed_sins(" ");
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| 116 | ed_sins (comm_beg);
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| 117 | ed_sins (comm_end);
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| 118 | e_igoff(-strlen (comm_end)); /* back over end string */
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| 119 | e_setcur();
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| 120 | }
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| 121 | #endif /*FX_INDCOMM*/
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| 122 |
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| 123 | #if FX_INDREL
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| 124 | /* EFUN: "Indent Relative" */
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| 125 | /* This used to mistakenly be called Indent Under.
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| 126 | ** Still not fully implemented.
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| 127 | ** If at beginning of line, looks back at previous indented line,
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| 128 | ** and indents this line that much. If there is no preceding indented
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| 129 | ** line or not at beginning of line, insert a tab.
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| 130 | */
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| 131 | f_indrel()
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| 132 | { register int c;
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| 133 | register n;
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| 134 | #if IMAGEN
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| 135 | chroff savdot;
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| 136 | #endif /*IMAGEN*/
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| 137 | #if ICONOGRAPHICS
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| 138 | chroff savdot;
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| 139 | int curind, newind, morebuf;
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| 140 | #endif /*ICONOGRAPHICS*/
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| 141 |
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| 142 | if((c = e_rgetc()) == EOF)
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| 143 | #if IMAGEN
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| 144 | return(f_insself(TAB)); /* Do mode-based tabbing */
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| 145 | #else
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| 146 | return(ed_insert(TAB));
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| 147 | #endif /*-IMAGEN*/
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| 148 |
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| 149 | if(c == LF)
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| 150 | { e_gobol();
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| 151 | e_gofwsp();
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| 152 | n = d_curind();
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| 153 | e_gonl(); /* Return to orig pos */
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| 154 | if(n)
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| 155 | { ed_indto(n);
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| 156 | #if IMAGEN
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| 157 | savdot = e_dot();
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| 158 | e_gofwsp();
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| 159 | ed_delete(savdot, e_dot());
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| 160 | #endif /*IMAGEN*/
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| 161 | return;
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| 162 | }
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| 163 | }
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| 164 | #if ICONOGRAPHICS
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| 165 | else
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| 166 | { e_igoff (1);
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| 167 | curind = indtion (savdot = e_dot ());
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| 168 | /* get current dot and indentation */
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| 169 | while (1) /* find a prev line that extends rightward */
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| 170 | { morebuf = e_gopl ();
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| 171 | e_goeol ();
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| 172 | if ((newind = d_curind()) > curind) break;
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| 173 | if (morebuf == 0) /* hit beginning of buffer */
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| 174 | { e_go (savdot);
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| 175 | f_delspc();
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| 176 | return (1);
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| 177 | }
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| 178 | }
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| 179 |
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| 180 | e_gobol ();
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| 181 | e_igoff (inindex (e_dot (), curind));
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| 182 | if (d_curind() > curind)
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| 183 | e_rgetc (); /* pushed ahead by tab */
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| 184 |
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| 185 | while (c_wsp (e_getc ()) == 0) ;
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| 186 | e_backc ();
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| 187 | e_fwsp ();
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| 188 | newind = d_curind();
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| 189 | e_go (savdot);
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| 190 | f_delspc();
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| 191 | ed_indto (newind);
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| 192 | }
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| 193 | #else
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| 194 | else e_getc();
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| 195 | #if IMAGEN
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| 196 | f_insself(TAB); /* Do mode-based tabbing */
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| 197 | #else
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| 198 | ed_insert(TAB);
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| 199 | #endif /*-IMAGEN*/
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| 200 | #endif /*-ICONOGRAPHICS*/
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| 201 | }
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| 202 | #endif /*FX_INDREL*/
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| 203 |
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| 204 | |
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| 205 |
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| 206 | /* Paren matching stuff. Note that this stuff will be very painful unless
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| 207 | ** tinwait() works properly.
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| 208 | */
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| 209 | #if 0
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| 210 | /* EFUN: "Self-Insert and Match" (intended to be bound to brackets) */
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| 211 | /* (KLH: Evidently this was never finished)
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| 212 | */
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| 213 | insertmatch(c)
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| 214 | register int c;
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| 215 | {
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| 216 |
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| 217 | }
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| 218 | #endif
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| 219 |
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| 220 | /* Should change this to Matching Paren */
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| 221 | #if FX_MATCHBRACK
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| 222 | /* EFUN: "Match Bracket" (not EMACS) - from IMAGEN config
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| 223 | * Show the matching bracket for the character right before dot
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| 224 | */
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| 225 | f_matchbrack()
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| 226 | {
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| 227 | chroff savdot;
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| 228 | register int i, mc, secs;
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| 229 |
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| 230 | if (exp_p)
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| 231 | secs = exp;
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| 232 | else
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| 233 | secs = 1;
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| 234 | savdot = cur_dot; /* Save our location */
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| 235 | mc = e_rgetc(); /* Pick up character before dot */
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| 236 | if (mc != ')' && mc != ']' && mc != '}')
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| 237 | { e_getc(); /* Nothing, try at dot instead */
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| 238 | e_getc();
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| 239 | mc = e_rgetc();
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| 240 | if (mc != ')' && mc != ']' && mc != '}')
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| 241 | { ding("What bracket?");
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| 242 | e_go(savdot);
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| 243 | return;
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| 244 | }
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| 245 | }
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| 246 | if (! matchonelevel(mc))
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| 247 | ring_bell();
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| 248 | else
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| 249 | { ed_setcur();
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| 250 | if (d_line(cur_dot) < 0)
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| 251 | secs = 10; /* Wait longer if off-screen */
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| 252 | redisplay(); /* Wish it were simple upd_wind() */
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| 253 | for (i = 1; i <= secs; ++i)
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| 254 | { if (tinwait())
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| 255 | break;
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| 256 | sleep(1);
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| 257 | }
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| 258 | }
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| 259 | e_gosetcur(savdot); /* Back to origin */
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| 260 | redp(RD_MOVE); /* Cursor has moved */
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| 261 | }
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| 262 |
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| 263 |
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| 264 | /* Try to match 'mc', return true iff found it */
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| 265 | matchonelevel(mc)
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| 266 | register int mc;
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| 267 | {
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| 268 | register int c;
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| 269 |
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| 270 | while ((c = e_rgetc()) != EOF)
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| 271 | { if (c == /*[*/ ']' || c == /*(*/ ')' || c == /*{*/ '}')
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| 272 | { if (! matchonelevel(c))
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| 273 | break;
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| 274 | }
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| 275 | else if (c == '(' /*)*/)
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| 276 | return(mc == /*(*/ ')');
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| 277 | else if (c == '[' /*]*/)
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| 278 | return(mc == /*[*/ ']');
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| 279 | else if (c == '{' /*}*/)
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| 280 | return(mc == /*{*/ '}');
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| 281 | }
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| 282 | return(0);
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| 283 | }
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| 284 | #endif /*FX_MATCHBRACK*/
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